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WO2022265192A1 - Appareil de gestion de batterie et son procédé de fonctionnement - Google Patents

Appareil de gestion de batterie et son procédé de fonctionnement Download PDF

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Publication number
WO2022265192A1
WO2022265192A1 PCT/KR2022/003880 KR2022003880W WO2022265192A1 WO 2022265192 A1 WO2022265192 A1 WO 2022265192A1 KR 2022003880 W KR2022003880 W KR 2022003880W WO 2022265192 A1 WO2022265192 A1 WO 2022265192A1
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WIPO (PCT)
Prior art keywords
battery
battery packs
voltage
value
relay
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/KR2022/003880
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English (en)
Korean (ko)
Inventor
황진우
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LG Energy Solution Ltd
Original Assignee
LG Energy Solution Ltd
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Filing date
Publication date
Application filed by LG Energy Solution Ltd filed Critical LG Energy Solution Ltd
Priority to JP2023518524A priority Critical patent/JP7537018B2/ja
Priority to EP22825123.7A priority patent/EP4207548B1/fr
Priority to US18/028,646 priority patent/US20230333175A1/en
Priority to CN202280006818.7A priority patent/CN116325283A/zh
Publication of WO2022265192A1 publication Critical patent/WO2022265192A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
    • H03K17/6871—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • Embodiments disclosed in this document relate to a battery management device and an operating method thereof.
  • the secondary battery is a battery capable of charging and discharging, and includes all of the conventional Ni/Cd batteries, Ni/MH batteries, and recent lithium ion batteries.
  • lithium ion batteries have the advantage of much higher energy density than conventional Ni/Cd batteries and Ni/MH batteries.
  • lithium ion batteries can be manufactured in a small size and light weight, so they are used as a power source for mobile devices. Recently, the use range has been expanded as a power source for electric vehicles, and it is attracting attention as a next-generation energy storage medium.
  • a plurality of battery packs could only be connected in parallel, but series connection of a plurality of battery packs is now possible through the use of simultaneous blocking technology and a freewheeling diode.
  • the pre-charge time increases because the pre-charge resistors are connected in series to increase the resistance value and reduce the amount of current flowing.
  • One object of the embodiments disclosed in this document is to provide a battery management device capable of reducing the pre-charging time of a plurality of battery packs connected in series.
  • a battery management device is an information acquisition unit that obtains a first voltage measured at an output terminal of each of a plurality of battery packs connected in series and a second voltage that is a voltage value of a battery module of each of the plurality of battery packs. and a controller generating a control signal for controlling operations of a precharge relay and a main relay included in each of the plurality of battery packs based on the first voltage and the second voltage.
  • the controller may generate a control signal for shorting a precharge relay included in each of the plurality of battery packs and opening a main relay when the operation of the plurality of battery packs connected in series is started. there is.
  • the controller calculates a first result value by summing the first voltage, compares the lowest value of the second voltage with the first result value, and the first result value is the second voltage value.
  • a control signal may be generated that opens a precharge relay included in a battery pack having a second voltage corresponding to the lowest voltage and shorts the main relay.
  • the controller calculates a second result value by adding up second voltages of battery packs in which a main relay is shorted among the plurality of battery packs, and calculates a second result value and a free one of the plurality of battery packs.
  • a third result value is calculated by summing the lowest values of the second voltages of the battery pack in which the charge relay is short-circuited, the first result value is compared with the third result value, and when the first result value is greater,
  • a control signal may be generated to open a pre-charge relay included in a battery pack having a second voltage corresponding to a lowest value among second voltages of a battery pack in which the pre-charge relay is short-circuited, and short-circuit the main relay.
  • the controller calculates a fourth result value by summing all the second voltages of the plurality of battery packs, and when a difference between the fourth result value and the first result value is equal to or less than a reference value, the controller A control signal for opening the pre-charge relays of the plurality of battery packs and shorting the main relays may be generated.
  • the main relay and the precharge relay may include any one of a Bipolar Junction Transistor (BJT) and a MOSFET.
  • BJT Bipolar Junction Transistor
  • MOSFET MOSFET
  • the precharge relay may be connected in series with a precharge resistor.
  • the number of battery modules may be plural.
  • a method of operating a battery management device includes obtaining a first voltage measured at an output terminal of each of a plurality of battery packs connected in series, and a battery module voltage value of each of the plurality of battery packs.
  • the method may include obtaining 2 voltages and generating a control signal for controlling operations of a precharge relay and a main relay included in each of the plurality of battery packs based on the first voltage and the second voltage. .
  • the step of starting the operation of the plurality of battery packs connected in series and generating a control signal for shorting a precharge relay included in each of the plurality of battery packs and opening a main relay may be further included.
  • generating a control signal for controlling operations of a precharge relay and a main relay included in each of the plurality of battery packs based on the first voltage and the second voltage may include the first voltage Calculating a first result value by summing, comparing the lowest value of the second voltage and the first result value, and when the first result value is greater than the lowest value of the second voltage, corresponding to the lowest value
  • the method may include generating a control signal for opening a precharge relay included in the battery pack having the second voltage and shorting a main relay.
  • generating a control signal for controlling operations of a precharge relay and a main relay included in each of the plurality of battery packs based on the first voltage and the second voltage may include: Calculating a second result value by summing second voltages of battery packs in which the main relay is short-circuited, the lowest value of the second result value and the second voltage of the battery pack in which the pre-charge relay is short-circuited among the plurality of battery packs Calculating a third result value by summing and comparing the first result value and the third result value, and when the first result value is greater, the second result value of the battery pack in which the precharge relay is short-circuited.
  • the method may further include generating a control signal for opening a precharge relay included in the battery pack having a second voltage corresponding to the lowest value among the voltages and shorting the main relay.
  • generating a control signal for controlling operations of a precharge relay and a main relay included in each of the plurality of battery packs based on the first voltage and the second voltage may include: Calculating a fourth result value by summing all the second voltages of and when the difference between the fourth result value and the first result value is equal to or less than a reference value, the precharge relays of the plurality of battery packs are opened and the main relay It may further include generating a control signal for shorting.
  • An apparatus for battery management may reduce a precharge time by generating a control signal for controlling a main relay and a precharge relay of each of a plurality of battery packs connected in series.
  • FIG. 1 is a block diagram showing a plurality of battery packs and a battery management device according to an embodiment disclosed in this document.
  • FIG. 2 is a block diagram showing a battery management device according to an embodiment disclosed in this document.
  • FIG. 3 is a diagram showing a battery pack according to an embodiment disclosed in this document.
  • FIG. 4 is a diagram showing pre-charge times of a plurality of battery packs according to an embodiment disclosed in this document.
  • FIG. 5 is a flowchart illustrating an operating method of a battery management device according to an exemplary embodiment disclosed in this document.
  • FIG. 6 is a flowchart illustrating steps further included in a method for operating a battery management device according to an embodiment disclosed in this document.
  • FIG. 1 is a block diagram showing a plurality of battery packs and a battery management device according to an embodiment disclosed in this document.
  • the battery management device 10 may control a plurality of battery packs 1000 .
  • the battery management device 10 may control charging and discharging of the plurality of battery packs 1000 .
  • a control signal for controlling a main relay (not shown) and a precharge relay (not shown) included in the plurality of battery packs 1000 may be generated.
  • the battery management device 10 may be included in at least one of the battery packs 100 , 200 , and 300 .
  • the first battery pack 100 may include the battery management device 10, and the battery management device 10 included in the first battery pack 100 relates to the plurality of battery packs 1000. Information may be acquired and a control signal for controlling the plurality of battery packs 1000 may be generated.
  • the battery management device 10 may perform communication (eg, CAN communication) with a battery management device (not shown) included in another battery pack.
  • the battery management device 10 may check the state of each of the plurality of battery packs 1000 .
  • the battery management device 10 may check a battery module voltage value and a voltage value of an output terminal of each of the plurality of battery packs 1000 .
  • the battery management device 10 may directly measure the state of each of the plurality of battery packs 1000, or may measure the plurality of battery packs 1000 from another battery management device (not shown) included in each of the plurality of battery packs 1000. ) information on each state may be obtained.
  • the plurality of battery packs 1000 may include a plurality of battery packs 100 , 200 , and 300 .
  • the battery packs 100, 200, and 300 may be serially connected to each other.
  • each of the battery packs 100, 200, and 300 may include a freewheeling diode.
  • the plurality of battery packs 1000 are illustrated as including three battery packs 100, 200, and 300, but are not limited thereto. That is, the plurality of battery packs 1000 may include n (n is a natural number equal to or greater than 2) battery packs, and the battery management device 10 may check the states of the n battery packs and select the n battery packs. It is possible to generate a control signal to control.
  • n is a natural number equal to or greater than 2
  • the battery management device 10 may check the states of the n battery packs and select the n battery packs. It is possible to generate a control signal to control.
  • the battery management device 10 may monitor states of a plurality of battery packs 1000 and control the plurality of battery packs 1000 to efficiently charge and discharge. signal can be generated.
  • FIG. 2 is a block diagram showing a battery management device according to an embodiment disclosed in this document.
  • the battery management device 10 may include an information acquisition unit 11 and a controller 12 .
  • the battery management device 10 may be substantially the same as the battery management device 10 of FIG. 1 . That is, the battery management device 10 may check the states of the plurality of battery packs 1000 of FIG. 1 and generate a control signal for controlling the plurality of battery packs 1000 .
  • the battery management device 10 will be described with reference to FIGS. 1 and 2 .
  • the information acquisition unit 11 may obtain a first voltage measured at an output terminal of each of a plurality of battery packs connected in series. For example, the information acquisition unit 11 may acquire a voltage value measured at an output terminal of each of the plurality of battery packs 1000 from an individual battery management device (not shown) included in each of the plurality of battery packs 1000. there is. As another example, the battery management device 10 may directly measure the voltage value of each output terminal of the plurality of battery packs 1000 , and the information acquisition unit 11 may obtain the measured voltage value.
  • the information acquisition unit 11 may obtain a first voltage measured at an output terminal of each of a plurality of battery packs connected in series. For example, the information acquisition unit 11 may acquire a voltage value measured at an output terminal of each of the plurality of battery packs 1000 from an individual battery management device (not shown) included in each of the plurality of battery packs 1000. there is. As another example, the battery management device 10 may directly measure the voltage value of each output terminal of the plurality of battery packs 1000 , and the information acquisition unit 11 may obtain the measured voltage value.
  • FIG. 3 is a diagram showing a battery pack according to an embodiment disclosed in this document.
  • a battery pack 100 (eg, the first battery pack 100 of FIG. 1 ) according to an embodiment disclosed in this document includes a battery module 110, a precharge resistor 120, a precharge A relay 130 and a main relay 140 may be included.
  • the battery pack 100 may be included in the plurality of battery packs 1000 of FIG. 1 . That is, the battery packs 100 , 200 , and 300 of FIG. 1 may be substantially the same as the battery pack 100 of FIG. 3 .
  • the battery management device 10 may obtain a voltage value V1 measured at an output terminal of the battery pack 100 .
  • the battery management device 10 may directly measure the voltage value of the output terminal of the battery pack 100, or another battery management device (not shown) inside the battery pack 100 may be included in the battery pack 100.
  • the voltage value of the output terminal of the battery pack 100 measured by another battery management device (not shown) included therein may be acquired.
  • the battery management device 10 may acquire the voltage value V2 of the battery module 110 of the battery pack 100 .
  • the battery management device 10 may directly measure the voltage value V2 of the battery module 110, or another battery management device (not shown) inside the battery pack 100 may be included in the battery pack ( 100)
  • the voltage value V2 of the battery module 110 measured by another battery management device (not shown) included therein may be acquired.
  • the battery pack 100 may include a plurality of battery modules 110 .
  • the battery pack 100 may include a plurality of battery modules 310 connected in series, and the battery management device 10 may acquire voltage values V2 of the plurality of battery modules 310 connected in series.
  • the battery pack 100 may include n (n is a natural number greater than or equal to 1) number of battery modules 110 .
  • the precharge resistor 120 may be a resistor for limiting the charging or discharging speed in order to balance the voltage with an external device (at least one of an inverter, converter, or capacitor) when charging or discharging the battery pack 100. .
  • the precharge resistor 120 can reduce the current flowing through the battery pack 100 when charging or discharging is performed by creating a load inside the battery pack 100 .
  • the precharge resistor 120 may be connected in series with the precharge relay 130 .
  • the precharge relay 130 and the main relay 140 may form a charging and discharging path of the battery pack 100 .
  • the battery pack 100 may short-circuit the pre-charge relay 130 and open the main relay 140 in the pre-charge step, and open the pre-charge relay 130 and open the main relay (140) in the main charge step. 140) can be short-circuited.
  • the battery pack 100 may open both the precharge relay 130 and the main relay 140 when the battery pack 100 is not in use.
  • the operations of the precharge relay 130 and the main relay 140 may be controlled by a control signal transmitted from the battery management device 10 of FIG. 2 .
  • the precharge relay 130 and the main relay 140 may include either a bipolar junction transistor (BJT) or a MOSFET.
  • BJT bipolar junction transistor
  • MOSFET MOSFET
  • the controller 12 determines the first voltage measured at the output terminal of each of the plurality of battery packs 1000 acquired by the information acquisition unit 11 and the battery module voltage of each of the plurality of battery packs 1000. Based on the value of the second voltage, a control signal for controlling the operation of the precharge relay and the main relay included in each of the plurality of battery packs 1000 may be generated. For example, when the plurality of battery packs 1000 do not operate, the controller 12 may generate a control signal for opening both a precharge relay and a main relay included in each of the plurality of battery packs 1000. .
  • the controller 12 may generate a control signal that shorts a precharge relay included in each of the plurality of battery packs 1000 and opens a main relay. there is. For example, the controller 12 shorts a precharge relay included in each of the plurality of battery packs 1000 and opens a main relay when charging or discharging of the plurality of battery packs 1000 starts. A signal may be generated, and the plurality of battery packs 1000 may perform a pre-charging step.
  • the controller 12 may calculate a first result value by summing the first voltages of each of the plurality of battery packs 1000 .
  • the controller 12 may calculate a voltage value measured at output terminals of all of the plurality of battery packs 1000 connected in series by summing the first voltages of each of the plurality of battery packs 1000 . That is, the first result value may be a voltage value measured at output terminals of the entirety of the plurality of battery packs 1000 connected in series.
  • the controller 12 may compare the lowest value among the second voltages of each of the plurality of battery packs 1000 with the first resultant value. For example, the controller 12 may compare the battery module voltage values of each of the plurality of battery packs 1000 to find the lowest value, and compare the found lowest value with the first resultant value.
  • the controller 12 sends a control signal for opening a precharge relay included in a battery pack having a second voltage corresponding to the lowest value and shorting the main relay.
  • the controller 12 sends a control signal for opening a precharge relay included in a battery pack having a second voltage corresponding to the lowest value among the second voltages of the plurality of battery packs 1000 and shorting the main relay. generated and transferred to a battery pack having a second voltage corresponding to the lowest value, and the battery pack having the second voltage corresponding to the lowest value opens the precharge relay and shorts the main relay to charge or discharge can be performed. That is, the precharge resistance of the entirety of the plurality of battery packs 1000 may decrease.
  • each of the plurality of battery packs 1000 is disconnected because the pre-charge relay is shorted and the main relay is open. Since the precharge resistance of R is connected in series and the total precharge resistance value is large, the controller 12 opens the precharge relay of one battery pack among the plurality of battery packs 1000 and shorts the main relay through the above-described process. It is possible to reduce the total precharge resistance value by generating a control signal that
  • the controller 12 may calculate a second result value by summing the second voltages of the battery packs in which the main relays are shorted among the plurality of battery packs 1000 .
  • the controller 12 may find the lowest value among the second voltages of the battery pack in which the pre-charge relay is short-circuited among the plurality of battery packs 1000, and may calculate a third result value by summing the second result value and the lowest value. .
  • the controller 12 compares the first result value with the third result value, and when the first result value is greater, the pre-charge relay has a second voltage corresponding to the lowest of the second voltages of the short-circuited battery pack.
  • a control signal for opening a precharge relay included in the battery pack and shorting a main relay may be generated.
  • the controller 12 may compare the voltage value of the output terminal of the entire plurality of battery packs 1000 with the third resultant value, and the voltage value of the output terminal of the entirety of the plurality of battery packs 1000 is greater than the third resultant value.
  • a plurality of batteries are generated by opening a pre-charge relay included in the battery pack having a second voltage corresponding to the lowest value among the second voltages of the battery pack in which the pre-charge relay is short-circuited and generating a control signal for short-circuiting the main relay.
  • the precharge resistance value of the entire pack 1000 may be reduced.
  • the controller 12 opens the pre-charge relay of the battery pack corresponding to the lowest value among the second voltages of the battery packs in which the pre-charge relay is short-circuited among the plurality of battery packs 1000 through the above-described process. , By generating a control signal for shorting the main relay, it is possible to sequentially decrease the precharge resistance value of the entirety of the plurality of battery packs 1000 .
  • the controller 12 may calculate a fourth result value by summing all the second voltages of the plurality of battery packs 1000 .
  • the controller 12 may generate a control signal that opens the precharge relays of all of the plurality of battery packs 1000 and shorts the main relays. there is.
  • the controller 12 may calculate a fourth result value by summing up the battery module voltage values of each of the plurality of battery packs 1000, and calculate the voltage value of the output terminal of each of the plurality of battery packs 1000.
  • a first result value may be calculated by summing all of them, and when the fourth result value and the first result value are compared and the difference is less than a reference value (threshold value, set value), all of the plurality of battery packs 1000 connected in series are free. By generating a control signal that opens the charge relay and shorts the main relay, the pre-charge step is finished and the main charge step can be performed.
  • the controller 12 applies a voltage to an external device (at least one of a capacitor, an inverter, or a converter) connected to the plurality of battery packs 1000 through the above-described process. It is possible to compare the value and the difference between the battery module voltage values of the plurality of battery packs 1000, and when the difference is less than a reference value, even if the main relays of all the plurality of battery packs 1000 are shorted, the plurality of battery packs 1000 Since this may not be damaged, it is possible to generate a control signal that opens the pre-charge relays of all of the plurality of battery packs 1000 and shorts the main relays.
  • an external device at least one of a capacitor, an inverter, or a converter
  • the battery management device 10 provides a plurality of batteries based on a voltage value measured at an output terminal of each of the plurality of battery packs 1000 and a battery module voltage value of each of the plurality of battery packs 1000.
  • a control signal for controlling the operation of each of the precharge relay and the main relay of the battery pack 1000 may be generated. Therefore, the battery management device 10 can sequentially reduce the precharge resistance of the entirety of the plurality of battery packs 1000 by sequentially reducing the number of battery packs in which the precharge relay is shorted and the main relay is open. , the pre-charging time of the plurality of battery packs 1000 can be reduced.
  • FIG. 4 is a diagram showing pre-charge times of a plurality of battery packs according to an embodiment disclosed in this document.
  • a first graph 410 which is a graph of pre-charge times of a plurality of battery packs connected in series, and a graph of pre-charge times of a plurality of battery packs connected in series controlled by the battery management device 10 Comparing the second graph 420, it can be seen that the slope of the increase in the voltage values V1 and V3 of the output terminals of the plurality of battery packs is steeper in the second graph 420 of the battery management device 10. there is.
  • the voltage V2 of the output terminal of each of the plurality of battery packs in the first graph 410 is a plurality of battery packs connected in series, it can be confirmed that the voltage of each output terminal is the same until the pre-charging step is finished.
  • the voltages (V3, V4, V5, and V6) of each of the output terminals of the plurality of battery packs in graph 2 420 are such that the battery management device 10 opens the pre-charge relay when the plurality of battery packs satisfy a predetermined condition. Since the control signals controlling the opening of the main relay are generated, it can be seen that they all have different values. Therefore, the time at which the precharging step in the second graph 420 is completed is the same as the precharging step in the first graph 410. You can see that it is shorter than the completion time. In addition, since the output current I2 in the second graph 420 is higher than the output current I1 in the first graph 410, the time to complete the precharge step is shorter than the output current I1 in the first graph 410 in the second graph. It can be determined that it is shorter in (420).
  • FIG. 5 is a flowchart illustrating an operating method of a battery management device according to an exemplary embodiment disclosed in this document.
  • the operating method of the battery management device 10 includes obtaining a first voltage measured at an output terminal of each of a plurality of serially connected battery packs (S110); Obtaining a second voltage that is the voltage value of each battery module of the battery pack (S120) and controlling the operation of a precharge relay and a main relay included in each of a plurality of battery packs based on the first voltage and the second voltage It may include generating a control signal (S130).
  • the information obtaining unit 11 may obtain the voltage value of the output terminal of each of the plurality of battery packs connected in series.
  • the information obtaining unit 11 may obtain the first voltage by directly measuring a voltage value of an output terminal of each of a plurality of battery packs.
  • the information acquisition unit 11 may obtain a first voltage, which is a voltage value of an output terminal of each of the plurality of battery packs, from each battery management device included in the plurality of battery packs.
  • the information obtaining unit 11 may obtain the battery module voltage value of each of the plurality of battery packs.
  • the information obtaining unit 11 may acquire a battery module voltage value of each of a plurality of battery packs from each battery management device included in the plurality of battery packs.
  • the information obtaining unit 11 may directly measure the voltage value of each battery module of a plurality of battery packs.
  • each of the plurality of battery packs may include a plurality of battery modules, and thus, a voltage value of each battery module of the plurality of battery packs may be a voltage value of a plurality of battery modules connected in series.
  • the controller 12 uses the information obtaining unit 11
  • a control signal for controlling the operation of the precharge relay and the main relay included in each of the plurality of battery packs may be generated based on the first voltage and the second voltage obtained in the above.
  • the precharge relay is a relay connected to the precharge resistor, and in a battery pack, when the precharge relay is shorted and the main relay is opened, the internal resistance increases due to the precharge resistor, and conversely, the precharge relay is opened. And when the main relay is short-circuited, the internal resistance becomes small. That is, the controller 12 may adjust the precharge resistance values of the entire plurality of battery packs by generating a control signal for controlling the precharge relay and the main relay included in each of the plurality of battery packs.
  • FIG. 6 is a flowchart illustrating steps further included in a method for operating a battery management device according to an embodiment disclosed in this document.
  • the operating method of the battery management device 10 includes starting the operation of a plurality of battery packs connected in series ( S210 ) and the battery packs included in each of the plurality of battery packs A step of generating a control signal for shorting the precharge relay and opening the main relay (S220) may be further included.
  • step S210 of starting the operation of the plurality of battery packs connected in series the controller 12 may check a state in which the operation of the plurality of battery packs connected in series has started.
  • the pre-charge relay and the main relay of each of the plurality of battery packs may be open before an operation starts.
  • the controller 12 may determine whether the plurality of battery packs are in a charged or discharged state.
  • the controller 12 In the step of generating a control signal for shorting the precharge relay included in each of the plurality of battery packs and opening the main relay (S220), the controller 12 when the operation of the plurality of battery packs starts, the plurality of battery packs It is possible to generate a control signal for shorting the precharge relay included in each and opening the main relay. For example, if all the main relays are short-circuited from the beginning, external devices (e.g. capacitors, inverters, converters) connected to multiple battery packs may cause the entire battery module of multiple battery packs to Damage may occur because the voltage and voltage difference are large and high current can flow. That is, in order to prevent damage to the plurality of battery packs or external devices, the controller 12 first shorts the pre-charge relay of each of the plurality of battery packs to balance the voltage value applied to the external device and the battery module voltage. .
  • external devices e.g. capacitors, inverters, converters
  • step S130 is calculating a first result value by summing the first voltages (S310), among the second voltage Comparing the lowest value with the first result value (S320), and when the first result value is greater than the lowest value among the second voltages, opening a precharge relay included in a battery pack having a second voltage corresponding to the lowest value, It may include generating a control signal for shorting the relay (S330).
  • step S310 of calculating the first result value by summing the first voltages the controller 12 may calculate the first result value by summing the first voltages that are the voltage values of the output terminals of each of the plurality of battery packs.
  • the first result value may be a voltage value of an output terminal of the entire plurality of battery packs.
  • the first result value may be a voltage applied to an external device connected to a plurality of battery packs.
  • the controller 12 compares the second voltage values, which are battery module voltage values of each of the plurality of battery packs, to find the lowest value, and compares the lowest value with the first result value. Results can be compared.
  • the controller 12 may generate a control signal that opens a precharge relay included in the battery pack having a second voltage corresponding to the lowest value and shorts the main relay. For example, the controller 12 opens a pre-charge relay included in a battery pack having a second voltage corresponding to the lowest value and generates a control signal to short-circuit the main relay, thereby reducing the pre-charge resistance of the entire battery pack. and the time for performing the pre-charging step can be reduced by reducing the pre-charging resistance.
  • step S130 in the operating method of the battery management device 10 second voltages of battery packs in which main relays are shorted are summed to obtain a second voltage.
  • Calculating a result value (S410) calculating a third result value by summing the second result value and the lowest value of the second voltages of the battery pack in which the precharge relay is short-circuited among the plurality of battery packs (S420), and When the first result value is greater than the first result value by comparing the third result value with the first result value, the precharge relay included in the battery pack having the second voltage corresponding to the lowest value among the second voltages of the short-circuited battery pack
  • a step of generating a control signal for opening the charge relay and shorting the main relay (S430) may be further included.
  • step S410 of calculating a second result value by summing the second voltages of the battery packs in which the main relay is shorted among the plurality of battery packs the controller 12 determines the battery of the battery packs in which the main relay is shorted among the plurality of battery packs.
  • a second result value may be calculated by summing up the second voltage, which is the module voltage.
  • step S420 of calculating a third result value by summing the second result value and the lowest value among the second voltages of the battery pack in which the precharge relay is short-circuited among the plurality of battery packs the controller 12 determines whether the precharge relay of the plurality of battery packs is short-circuited. A lowest value may be found by comparing the second voltage of the battery pack in which the charge relay is shorted, and a third resultant value may be calculated by summing the lowest value and the second resultant value.
  • the first result value is compared with the third result value, and when the first result value is greater, the pre-charge relay is included in the battery pack having the second voltage corresponding to the lowest value among the second voltages of the short-circuited battery pack.
  • the controller 12 compares the first result value calculated in step S310 with the third result value, so that the first result value is In a case where the precharge relay is shorted, a control signal may be generated to open a precharge relay included in the battery pack having a second voltage corresponding to the lowest value among the second voltages of the shorted battery pack and short the main relay. .
  • the controller 12 may periodically compare the first result value and the third result value, and when the first result value becomes larger, the precharge relay of one of the short-circuited battery packs is opened and the main By generating a control signal for shorting the relay, precharge resistance of the entire battery pack may be reduced.
  • step S130 includes calculating a fourth result value by summing all the second voltages of a plurality of battery packs (S510) and the fourth result value.
  • the method may further include generating a control signal for opening the precharge relays of the plurality of battery packs and shorting the main relays when the difference between the value and the first result value is less than or equal to a reference value ( S520 ).
  • step S510 of calculating a fourth result value by summing up the second voltages of the plurality of battery packs the controller 12 sums up all the second voltages, which are battery module voltage values of each of the plurality of battery packs, to obtain the fourth result value. value can be calculated.
  • the fourth result value may be a battery module voltage value of all battery packs.
  • the controller 12 When the difference between the fourth result value and the first result value is equal to or less than the reference value, the controller 12 generates a control signal for opening the pre-charge relays of the plurality of battery packs and shorting the main relay (S520).
  • a difference between the value and the first result value calculated in step S310 may be calculated, and when the difference is less than or equal to a reference value, a control signal may be generated to open precharge relays of all of the plurality of battery packs and short-circuit the main relay. For example, when the difference between the fourth result value and the first result value is less than or equal to the reference value, damage to the battery pack or external device may not occur even if the precharge relays of all of the plurality of battery packs are opened and the main relay is shorted.
  • the controller 12 opens the precharge relay of all of the plurality of battery packs and provides a control signal for shorting the main relay.
  • the operating method of the battery management device 10 disclosed in this document sequentially counts the number of battery packs in which the precharge relay is shorted and the main relay is open, among a plurality of battery packs, through the performance of the operations of FIGS. 7 to 9 .
  • the pre-charging step can be ended by opening the pre-charging relays of all of the plurality of battery packs and generating a control signal for shorting the main relay through the execution of step S520. That is, in the operating method of the battery management device 10, the number of battery packs in which the main relay is short-circuited sequentially increases, thereby reducing the pre-charge time of the plurality of battery packs connected in series.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Protection Of Static Devices (AREA)

Abstract

Le présent document porte, selon un mode de réalisation, sur un appareil de gestion de batterie qui peut comprendre : une unité d'acquisition d'informations configurée pour obtenir des premières tensions mesurées aux extrémités de sortie de blocs-batteries respectifs raccordés en série et des secondes tensions qui sont les valeurs de tension de module de batterie des blocs-batteries respectifs ; et un dispositif de commande configuré pour générer des signaux de commande qui commandent les opérations d'un relais de précharge et d'un relais principal inclus dans chaque bloc-batterie de la pluralité de blocs-batteries, sur la base des premières tensions et des secondes tensions.
PCT/KR2022/003880 2021-06-17 2022-03-21 Appareil de gestion de batterie et son procédé de fonctionnement Ceased WO2022265192A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2023518524A JP7537018B2 (ja) 2021-06-17 2022-03-21 電池管理装置およびその動作方法
EP22825123.7A EP4207548B1 (fr) 2021-06-17 2022-03-21 Appareil de gestion de batterie et son procédé de fonctionnement
US18/028,646 US20230333175A1 (en) 2021-06-17 2022-03-21 Battery management apparatus and operating method thereof
CN202280006818.7A CN116325283A (zh) 2021-06-17 2022-03-21 电池管理装置及其操作方法

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KR1020210078981A KR20220168909A (ko) 2021-06-17 2021-06-17 배터리 관리 장치 및 그것의 동작 방법
KR10-2021-0078981 2021-06-17

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EP (1) EP4207548B1 (fr)
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US12136840B2 (en) * 2021-12-24 2024-11-05 Motorola Solutions, Inc. Device, battery and system to control battery power

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JP2010057290A (ja) * 2008-08-28 2010-03-11 Sanyo Electric Co Ltd 車両用の電源装置
KR20140131174A (ko) * 2013-05-03 2014-11-12 주식회사 엘지화학 펄스 폭 변조를 이용하는 프리 차지 기능의 배터리 관리 장치 및 배터리 관리 방법
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JP2023542972A (ja) 2023-10-12
EP4207548A1 (fr) 2023-07-05
CN116325283A (zh) 2023-06-23
KR20220168909A (ko) 2022-12-26
JP7537018B2 (ja) 2024-08-20
EP4207548B1 (fr) 2025-11-26
US20230333175A1 (en) 2023-10-19

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